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soc: fsl: qe: avoid IS_ERR_VALUE in ucc_slow.c 

When trying to build this for a 64-bit platform, one gets warnings
from using IS_ERR_VALUE on something which is not sizeof(long).

Instead, change the various *_offset fields to store a signed integer,
and simply check for a negative return from qe_muram_alloc(). Since
qe_muram_free() now accepts and ignores a negative argument, we only
need to make sure these fields are initialized with -1, and we can
just unconditionally call qe_muram_free() in ucc_slow_free().

Note that the error case for us_pram_offset failed to set that field
to 0 (which, as noted earlier, is anyway a bogus sentinel value).

Reviewed-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
This commit is contained in:
Rasmus Villemoes 2019-11-28 15:55:45 +01:00 committed by Li Yang
parent ec2058ac8f
commit 611780a6aa
2 changed files with 12 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/soc/fsl/qe/ucc_slow.c
View File

@ -154,6 +154,9 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
__func__);
return -ENOMEM;
}
uccs->rx_base_offset = -1;
uccs->tx_base_offset = -1;
uccs->us_pram_offset = -1;
/* Fill slow UCC structure */
uccs->us_info = us_info;
@ -179,7 +182,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
/* Get PRAM base */
uccs->us_pram_offset =
qe_muram_alloc(UCC_SLOW_PRAM_SIZE, ALIGNMENT_OF_UCC_SLOW_PRAM);
if (IS_ERR_VALUE(uccs->us_pram_offset)) {
if (uccs->us_pram_offset < 0) {
printk(KERN_ERR "%s: cannot allocate MURAM for PRAM", __func__);
ucc_slow_free(uccs);
return -ENOMEM;
@ -206,10 +209,9 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
uccs->rx_base_offset =
qe_muram_alloc(us_info->rx_bd_ring_len * sizeof(struct qe_bd),
QE_ALIGNMENT_OF_BD);
if (IS_ERR_VALUE(uccs->rx_base_offset)) {
if (uccs->rx_base_offset < 0) {
printk(KERN_ERR "%s: cannot allocate %u RX BDs\n", __func__,
us_info->rx_bd_ring_len);
uccs->rx_base_offset = 0;
ucc_slow_free(uccs);
return -ENOMEM;
}
@ -217,9 +219,8 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
uccs->tx_base_offset =
qe_muram_alloc(us_info->tx_bd_ring_len * sizeof(struct qe_bd),
QE_ALIGNMENT_OF_BD);
if (IS_ERR_VALUE(uccs->tx_base_offset)) {
if (uccs->tx_base_offset < 0) {
printk(KERN_ERR "%s: cannot allocate TX BDs", __func__);
uccs->tx_base_offset = 0;
ucc_slow_free(uccs);
return -ENOMEM;
}
@ -352,14 +353,9 @@ void ucc_slow_free(struct ucc_slow_private * uccs)
if (!uccs)
return;
if (uccs->rx_base_offset)
qe_muram_free(uccs->rx_base_offset);
if (uccs->tx_base_offset)
qe_muram_free(uccs->tx_base_offset);
if (uccs->us_pram)
qe_muram_free(uccs->us_pram_offset);
qe_muram_free(uccs->rx_base_offset);
qe_muram_free(uccs->tx_base_offset);
qe_muram_free(uccs->us_pram_offset);
if (uccs->us_regs)
iounmap(uccs->us_regs);

6
include/soc/fsl/qe/ucc_slow.h
View File

@ -185,7 +185,7 @@ struct ucc_slow_private {
struct ucc_slow_info *us_info;
struct ucc_slow __iomem *us_regs; /* Ptr to memory map of UCC regs */
struct ucc_slow_pram *us_pram; /* a pointer to the parameter RAM */
u32 us_pram_offset;
s32 us_pram_offset;
int enabled_tx; /* Whether channel is enabled for Tx (ENT) */
int enabled_rx; /* Whether channel is enabled for Rx (ENR) */
int stopped_tx; /* Whether channel has been stopped for Tx
@ -194,8 +194,8 @@ struct ucc_slow_private {
struct list_head confQ; /* frames passed to chip waiting for tx */
u32 first_tx_bd_mask; /* mask is used in Tx routine to save status
and length for first BD in a frame */
u32 tx_base_offset; /* first BD in Tx BD table offset (In MURAM) */
u32 rx_base_offset; /* first BD in Rx BD table offset (In MURAM) */
s32 tx_base_offset; /* first BD in Tx BD table offset (In MURAM) */
s32 rx_base_offset; /* first BD in Rx BD table offset (In MURAM) */
struct qe_bd *confBd; /* next BD for confirm after Tx */
struct qe_bd *tx_bd; /* next BD for new Tx request */
struct qe_bd *rx_bd; /* next BD to collect after Rx */